package com.ny.demo523;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.Scanner;
     public  class LoginDemo {
        public static  void main(String[] args) throws  ClassNotFoundException, SQLException {
        Connection connection = SqlConnection.getCon();
            Scanner sc = new Scanner(System.in);
            System.out.println("请输入用户名：");
            String username = sc.next();
            System.out.println("请输入密码：");
            String password = sc.next();
            String sql = "select * from users where username = ? and password = ?";
            PreparedStatement preparedStatement = connection.prepareStatement(sql);
            preparedStatement.setString(1,username);
            preparedStatement.setString(2,password);
            ResultSet resultSet = preparedStatement.executeQuery();
            if(resultSet.next()){
                String name = resultSet.getString("username");
                String pwd = resultSet.getString("password");
                System.out.println("用户名是："+name);
                System.out.println("密码是："+pwd);
                System.out.println("登录成功！");
            }else
                System.out.println("登录失败！");
            }


        }

